The NuSTAR view of the non-thermal emission from PSR J0437-4715

Simple item page
dc.contributor.authorGuillot, S.
dc.contributor.authorKaspi, V. M.
dc.contributor.authorArchibald, R. F.
dc.contributor.authorBachetti, M.
dc.contributor.authorFlynn, C.
dc.contributor.authorJankowski, F.
dc.contributor.authorBailes, M.
dc.contributor.authorBoggs, S.
dc.contributor.authorChristensen, F. E.
dc.contributor.authorCraig, W. W.
dc.contributor.authorHailey, C. A.
dc.contributor.authorHarrison, F. A.
dc.contributor.authorStern, D.
dc.contributor.authorZhang, W. W.
dc.date.accessioned2024-01-10T12:09:46Z
dc.date.available2024-01-10T12:09:46Z
dc.date.issued2016
dc.description.abstractWe present a hard X-ray Nuclear Spectroscopic Telescope Array (NuSTAR) observation of PSR J0437-4715, the nearest millisecond pulsar. The known pulsations at the apparent pulse period similar to 5.76 ms are observed with a significance of 3.7 sigma, at energies up to 20 keV above which the NuSTAR background dominates. We measure a photon index Gamma = 1.50 +/- 0.25 (90 per cent confidence) for the power-law fit to the non-thermal emission. It had been shown that spectral models with two or three thermal components fit the XMM-Newton spectrum of PSR J0437-4715, depending on the slope of the power-law component, and the amount of absorption of soft X-rays. The new constraint on the high-energy emission provided by NuSTAR removes ambiguities regarding the thermal components of the emission below 3 keV. We performed a simultaneous spectral analysis of the XMM-Newton and NuSTAR data to confirm that three thermal components and a power law are required to fit the 0.3-20 keV emission of PSR J0437-4715. Adding a ROSAT-PSPC spectrum further confirmed this result and allowed us to better constrain the temperatures of the three thermal components. A phase-resolved analysis of the NuSTAR data revealed no significant change in the photon index of the high-energy emission. This NuSTAR observation provides further impetus for future observations with the NICER mission (Neutron Star Interior Composition Explorer) whose sensitivity will provide much stricter constraints on the equation of state of nuclear matter by combining model fits to the pulsar's phase-folded light curve with the pulsar's well-defined mass and distance from radio timing observations.
dc.description.funderNational Aeronautics and Space Administration
dc.description.funderNSERC
dc.description.funderCentre de Recherche en Astrophysique du Quebec
dc.description.funderR. Howard Webster Foundation from the Canadian Institute for Advanced Study
dc.description.funderCanada Research Chairs Program
dc.description.funderLorne Trottier Chair in Astrophysics and Cosmology
dc.description.funderAustralian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)
dc.fechaingreso.objetodigital2024-04-29
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stw2194
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stw2194
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76521
dc.identifier.wosidWOS:000393566000026
dc.information.autorucFísica;Guillot S;S/I;1015726
dc.issue.numero3
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final2622
dc.pagina.inicio2612
dc.publisherOXFORD UNIV PRESS
dc.revistaMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.rightsacceso restringido
dc.subjectstars: neutron
dc.subjectpulsars: individual: PSR 0437-4715
dc.subjectMILLISECOND PULSAR J0437-4715
dc.subjectHIGH-ENERGY EMISSION
dc.subjectEQUATION-OF-STATE
dc.subjectXMM-NEWTON OBSERVATIONS
dc.subjectX-RAY OBSERVATIONS
dc.subjectNEUTRON-STAR
dc.subjectDENSE MATTER
dc.subjectRADIUS CONSTRAINTS
dc.subjectGLOBULAR-CLUSTERS
dc.subjectIMPROVED MASS
dc.titleThe NuSTAR view of the non-thermal emission from PSR J0437-4715
dc.typeartículo
dc.volumen463
sipa.codpersvinculados1015726
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
The NuSTAR view of the non-thermal emission from PSR J0437-4715.pdf
Size:
3.3 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas